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首页> 外文期刊>Nanotechnology >Fabrication of hexagonally patterned flower-like silver particle arrays as surface-enhanced Raman scattering substrates
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Fabrication of hexagonally patterned flower-like silver particle arrays as surface-enhanced Raman scattering substrates

机译：六边形图案的花状银粒子阵列作为表面增强拉曼散射基底的制备

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摘要

Hierarchical assembly of plasmonic nanostructures can induce high surface-enhanced Raman scattering (SERS) activity. However, it is a challenge to uniformly disperse the hierarchical nanostructures onto a planar substrate to achieve SERS signal reproducibility. This report presents a facile route to fabricate a hexagonally patterned flower-like silver particle array as the SERS substrate. First, hexagonally ordered silver hemisphere arrays with smooth surface are molded in the pores of an anodic aluminum oxide template. Ag-nanosheets are then electrodeposited onto the surface of individual silver hemispheres. The numerous nano-edges and nano-gaps between adjacent nanosheets render a large number of hot spots, leading to high SERS activity over a larger area of chip. The silver flower-like array is employed as the SERS substrate, which is able to detect 0.1 nM rhodamine 6 G and 1 mu M 3,3', 4,4'-tetrachlorobiphenyl (PCB-77, a persistent organic pollutant).
机译：等离子体纳米结构的分层组装可以诱导高表面增强拉曼散射（SERS）活性。然而，将分级纳米结构均匀地分散在平面基板上以实现SERS信号再现性是一个挑战。该报告提出了制造六边形图案的花状银颗粒阵列作为SERS衬底的便捷途径。首先，将具有光滑表面的六边形有序的银半球阵列模制在阳极氧化铝模板的孔中。然后将银纳米片电沉积到单个银半球的表面上。相邻纳米片之间的大量纳米边缘和纳米间隙会产生大量热点，从而在较大的芯片面积上导致较高的SERS活性。银花状阵列用作SERS底物，它能够检测0.1 nM罗丹明6 G和1μM 3,3'，4,4'-四氯联苯（PCB-77，一种持久性有机污染物）。

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